按幻觉产生的条件分类，以下哪种幻觉不包括在内

A．功能性幻觉

B．反射性幻觉

C．入睡前幻觉

D．心因性幻觉

E．真性幻觉

If you wear extra clothing when entering the water after abandoning ship it will（）.

A.weigh you down

B.preserve body heat

C.reduce your body heat

D.make it more difficult to breathe